export default {
  // 乘法
  accMul(arg1, arg2) {
    if (isNaN(arg1)) {
      arg1 = 0
    }
    if (isNaN(arg2)) {
      arg2 = 0
    }
    arg1 = Number(arg1)
    arg2 = Number(arg2)

    var m = 0
    var s1 = arg1.toString()
    var s2 = arg2.toString()
    try {
      m += s1.split('.')[1].length
    } catch (e) { }
    try {
      m += s2.split('.')[1].length
    } catch (e) { }
    return Number(s1.replace('.', '')) * Number(s2.replace('.', '')) / Math.pow(10, m)
  },
  // 加法
  accAdd(arg1, arg2) {
    if (isNaN(arg1)) {
      arg1 = 0
    }
    if (isNaN(arg2)) {
      arg2 = 0
    }
    arg1 = Number(arg1)
    arg2 = Number(arg2)
    var r1, r2, m, c
    try {
      r1 = arg1.toString().split('.')[1].length
    } catch (e) {
      r1 = 0
    }
    try {
      r2 = arg2.toString().split('.')[1].length
    } catch (e) {
      r2 = 0
    }
    c = Math.abs(r1 - r2)
    m = Math.pow(10, Math.max(r1, r2))
    if (c > 0) {
      var cm = Math.pow(10, c)
      if (r1 > r2) {
        arg1 = Number(arg1.toString().replace('.', ''))
        arg2 = Number(arg2.toString().replace('.', '')) * cm
      } else {
        arg1 = Number(arg1.toString().replace('.', '')) * cm
        arg2 = Number(arg2.toString().replace('.', ''))
      }
    } else {
      arg1 = Number(arg1.toString().replace('.', ''))
      arg2 = Number(arg2.toString().replace('.', ''))
    }
    return (arg1 + arg2) / m
  },
  // 减法
  accSub(arg1, arg2) {
    if (isNaN(arg1)) {
      arg1 = 0
    }
    if (isNaN(arg2)) {
      arg2 = 0
    }
    arg1 = Number(arg1)
    arg2 = Number(arg2)

    var r1, r2, m, n
    try {
      r1 = arg1.toString().split('.')[1].length
    } catch (e) {
      r1 = 0
    }
    try {
      r2 = arg2.toString().split('.')[1].length
    } catch (e) {
      r2 = 0
    }
    m = Math.pow(10, Math.max(r1, r2)) // last modify by deeka //动态控制精度长度
    n = (r1 >= r2) ? r1 : r2
    return ((arg1 * m - arg2 * m) / m).toFixed(n)
  }
}
